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CVE-2021-46919

dmaengine: idxd: fix wq size store permission state

MEDIUM
5.5
CVSS Score
Published: February 27, 2024 at 06:53 AM UTC
Updated: June 17, 2026 at 04:15 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix wq size store permission state WQ size can only be changed when the device is disabled. Current code allows change when device is enabled but wq is disabled. Change the check to detect device state.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.11.0 ≤ v < 5.11.165.6 ≤ v < 5.10.325.6 ≤ v < 5.11.165.6 ≤ v < 5.125.6.0 ≤ v < 5.10.325.6c52ca478233c172b2d322b5241d6279a8661cbba
Vendor states this is fixed in 05b7791c4c4aa8304368fdc55ae911f6b34e7281 (fixed)
Vendor states this is fixed in 0fff71c5a311e1264988179f7dcc217fda15fadd (fixed)
Vendor states this is fixed in 4ecf25595273203010bc8318c4aee60ad64037ae (fixed)
Vendor states this is fixed in 5.10.32 (unaffected)
Vendor states this is fixed in 5.11.16 (unaffected)
Vendor states this is fixed in 5.12 (unaffected)
Vendor states this is fixed in 5.6 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/05b7791c4c4aa8304368fdc55ae911f6b34e7281
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/0fff71c5a311e1264988179f7dcc217fda15fadd
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4ecf25595273203010bc8318c4aee60ad64037ae

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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